Fix #35171: crash rendering cube with two subsurf modifier in some circumstances.
Problem was actually integer overflow in the requested data layers (1 << 31) does
not fit in an integer, it only goes up to (1 << 31) - 1.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56441 954f8c5b-7b00-dc11-b283-0030488c597c